That is used in mathematical or logical expressions to represent a variable quantity .
用在数学或者逻辑表达式里代表一个可变量的符号。
A symbol that is used in mathematical or logical expressions to represent a variable quantity.
用在数学或者逻辑表达式里代表一个可变量的符号。
Because the brake clearance is influenced by axis moving, the swing of disk brake, its result is a variable quantity.
提升机闸瓦间隙大小受到轴窜、偏摆等的影响，所以其值是一个动态变化的量。
This paper put forward the scheme applying modern control theory-state variable quantity observation and control to boiler's main steam temperature control system as well as parameter tuning method.
提出了把现代控制理论的状态变量观测与控制系统理论应用于主汽温度控制系统的方案和参数整定方法。
This paper put forward the scheme applying modern control theory-state variable quantity observation and control to boiler's main steam temperature control system as well as parameter tuning method.
提出了把现代控制理论的状态变量观测与控制系统理论应用于主汽温度控制系统的方案和参数整定方法。
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